On the preview, you may notice the images are too big. If that's the case, simply copy the following CSS code and paste it into the "Custom CSS" box on your Schedule Widget settings page (the same page you clicked "Preview" on)

.hc-class-image { width: 50%; height: 50%; }

Now, if the images are still too big, simply change each of the 50%'s above to something smaller such as 40%, 30%, etc. whatever works for you. Make sure you change both percentages.